George Davies, the man who pioneered supermarket fashion and founded Next, and acknowledged as one of the UK's most talented fashion retailers, is leaving Asda.Mr Davies, the creator of the George brand at Asda, has not renewed his contract which runs out on Tuesday.But Asda, now owned by the US discounter, Wal-Mart, says the famous brand, which Mr Davies has built up to a £600m a year business in 10 years, will not disappear and the George name will not be changed.